Vion previously rejected an offer of assistance from the Scottish Government, saying that hurling money at the problem could not save the outdated plant.

But eleventh-hour talks were held yesterday between Vion and the task force set up by the Government, trade unions and West Lothian Council, resulting in the firm agreeing to extend the deadline for potential buyers to tomorrow.

We will continue to work with Vion as they consider their final two bids

Finance Secretary John Swinney

Vion said it would start phased closure plans if a buyer was not found, but in a letter to workers last week stressed talks were continuing with parties interested in the factory.

Finance Secretary John Swinney said the task force would put in place a recovery plan if the firm closes without a buyer.

He added: “The Scottish Government and its agencies have taken every action in our power to secure the future of the plant, working with the company and stakeholders.

“We will continue to work with Vion as they consider their final two bids.”